Hundards years ago, when America was built, a big issue puzzle the American people. Federalist or Anti-Federalist. There were two group of people were arguement for six mouth, which is better to govern the new country? The federalist is better.
What is federalist? The Federalist means a country which has several political beliefs, every state can have their own political and law, basic is established by the federal government. So the different steates have different political, and they don't need to restrain by the other states also by the federal government. There are about two hundreds countries in the world, and the federalist country more than twenty. Although there are just twenty countries are federalist and the population is more than 2.2 billion people are live in federalist contries, and include half area all over the world.
Compare to the other policial system, federalist has more freedm, like America. When America indenpenced there were just thirteen states at the begin. Then more and more places became United States. Every new states joined in to America, they can make their own law for their own condition. This is a good choice for the different people and different religion. There are no religion war in one federalist, and the state government are respect every different people and different culture, they can have some special rules for the culture and tradition, and that is not limit by the federal government.
For the federal government, when they decided the law and big event, they need to get every single state consent, if is not, then is not pass. All the states can restrict the federal government rights, and the federal can not have absolute rights, so it is more democracy than anti-federalist.